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50 KVA Power Supply
I just thought I would update you guys on the power supply
developments...
I had my brother come over to shoot a short roll of film. I got a
few shots of me pulling six inch arcs off of the HV bushings on
the pair of series-HV/parallel-LV, 7200-120/240 volt, 25 KVA
pigs. For Chip's pleasure I popped the top off one can for a
couple of shots inside. I was removing a bracket inside the
cover which obstructed the shot: two cotter pins, I removed one
and my brother removed the second one. My brother promptly
dropped his into the oil...
After ten minutes of looking with a light I located the cotter
pin on top of the HV winding close to the internal breaker
assembly. Not a good location. My brother offered to go to the
tool supply place for a magnet mounted on the end of an extension
rod to retrieve the fallen pin, but he will be out of town all
weekend, so it will be early next week... at the earliest...
I was going to set up the Jacob's Ladder and get some good photos
of the new power supply while running the rails. Since I could
not I had my brother shoot the rest of the roll up on the 22890
volt pig while harnessed to the ladder. The film went up to the
drugstore today, I should have scans soon.
BTW, someone asked about Jacob's Ladders: don't use welding rod
above neon power levels. It is too thin and does not sink enough
heat. I refer copper tubing for my Jacob's Ladders, with 3/8 inch
OD about the minimum diameter. The soft tubing used to wind
primary coils is good for run times of a minute or so, and it is
easy to bend and adjust. On a two bushing pig you can crimp down
one end of the tubing and clamp the crimp down right to the HV
bushing on the pig. For continuous running Jacob's Ladders I
would use a 1/2 inch OD steel pipe to prevent the heat droopies.
Richard Quick
... If all else fails... Throw another megavolt across it!
___ Blue Wave/QWK v2.12